US7475628B2 - Device for dispensing milk and/or milk froth - Google Patents

Device for dispensing milk and/or milk froth Download PDF

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Publication number
US7475628B2
US7475628B2 US10/555,120 US55512005A US7475628B2 US 7475628 B2 US7475628 B2 US 7475628B2 US 55512005 A US55512005 A US 55512005A US 7475628 B2 US7475628 B2 US 7475628B2
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Prior art keywords
milk
container
peristaltic pump
coffee
dispensing
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US20070031558A1 (en
Inventor
André Lüssi
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Schaerer AG
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Schaerer AG
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Assigned to SCHAERER AG reassignment SCHAERER AG CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE'S STREET ADDRESS FROM ALLMENDSTRASSE 8, ZUCHWIL, SWITZERLAND TO ALLMENDWEG 8, ZUCHWIL, SWITZERLAND PREVIOUSLY RECORDED ON REEL 026551 FRAME 0819. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNOR'S INTEREST.. Assignors: M. SCHAERER AG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/12Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1284Means for pushing the backing-plate against the tubular flexible member
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/40Beverage-making apparatus with dispensing means for adding a measured quantity of ingredients, e.g. coffee, water, sugar, cocoa, milk, tea
    • A47J31/402Liquid dosing devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/44Parts or details or accessories of beverage-making apparatus
    • A47J31/4482Details allowing to adapt the beverage-making apparatus to the size of the brewing vessel or the beverage container, e.g. with adjustable support for the beverage container or adjustable hot water outlet
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/44Parts or details or accessories of beverage-making apparatus
    • A47J31/4485Nozzles dispensing heated and foamed milk, i.e. milk is sucked from a milk container, heated and foamed inside the device, and subsequently dispensed from the nozzle
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/44Parts or details or accessories of beverage-making apparatus
    • A47J31/46Dispensing spouts, pumps, drain valves or like liquid transporting devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/44Parts or details or accessories of beverage-making apparatus
    • A47J31/46Dispensing spouts, pumps, drain valves or like liquid transporting devices
    • A47J31/468Pumping means

Definitions

  • the present invention relates to a device for dispensing milk and/or milk froth from a container containing milk that is placeable in a coolable cabinet which is held in a frame and into which an extraction line is insertable, which is connected, via a further line, to an emulsifying device disposed outside the coolable cabinet, through which emulsifying device the milk to be dispensed is conductible and reaches the discharge nozzle, into which emulsifying device steam is introducible with which the milk conducted through the emulsifying device is able to be heated up and/or frothed up.
  • Devices of this type are known. They are used in many cases in connection with coffee machines, whether as a device functioning independently of the coffee machine, or as a module integrated into the coffee machine, the coffee machine being able to supply automatically different kinds of coffee, e.g. milk coffee, cappuccino and macchiato, in addition to black coffee and espresso. Moreover warm milk can also be dispensed using these devices.
  • coffee machines whether as a device functioning independently of the coffee machine, or as a module integrated into the coffee machine, the coffee machine being able to supply automatically different kinds of coffee, e.g. milk coffee, cappuccino and macchiato, in addition to black coffee and espresso.
  • warm milk can also be dispensed using these devices.
  • the entire system through which milk flows is cleaned with this cleaning procedure.
  • the cleaning agent must have a low temperature since it has to be suctioned by the emulsifying device, which would not be ensured in the case of cleaning agents with high temperature since the suction step is optimally conceived for cold media. It is therefore necessary to use cold cleaning solutions which have to be relatively aggressive in order to meet the required level of hygiene. Cleaning agents of this kind have to be classified as dangerous substances, and thus require the corresponding necessary precautions, making it complicated and costly as regards application and logistical, storage and transport-related handling.
  • the object of the present invention is therefore to create a device for dispensing milk and/or milk froth which delivers the products to be dispensed in optimal quality, and which makes possible a simple and optimal cleaning of the system.
  • the further line is made up of a flexible tube which is inserted in a peristaltic pump, which peristaltic pump is equipped with switching means with which the peristaltic pump is switchable from a closed pump state into an open pump state releasing the passage of the flexible tube.
  • the milk to be suctioned through the emulsifying device and to be provided optimally as milk froth or hot milk portion-wise; it is also possible to dispense cold milk (through use of the peristaltic pump) and then milk froth (through use of the emulsifying device) portion-wise, whereby a coffee having the designation of “macchiato” can be produced, for instance. It is likewise possible to convey cold milk using the peristaltic pump.
  • a hot solution with a cleaning agent that is an alkaline solution, which can dissolve fats considerably more efficiently than comparable cold solutions, can be pumped through the device using the peristaltic pump.
  • the peristaltic pump is preferably disposed inside the coolable cabinet, and is drivable by means of a drive motor disposed outside the coolable cabinet. Achieved thereby is that milk located in the system of lines is also cooled, thus ensuring milk quality.
  • a further advantageous embodiment of the invention consists in the switching means for the peristaltic pump being made up of a piston cylinder unit whose piston rod is connected to the curved part bordering the squeeze space.
  • this piston cylinder unit is actuated by water under pressure, the pressurization being controllable via a valve and the return water being dischargeable as waste water, easy handling combined with simple structure is achieved.
  • the water under pressure can be obtained, for example, directly from the mains. If the device is integrated in a coffee machine, this pressurized water can also be obtained from the coffee machine.
  • the direction of rotation of the peristaltic pump is reversed after the milk dispensing process, the milk located in the further line being pumped back into the container.
  • Another advantageous embodiment of the invention consists in means for determining the weight of the container being disposed in the region of the floor of the cabinet on which the container is placeable.
  • the filling level of the container can thereby be measured, and transmitted in suitable way to the device's control means.
  • the filling level can then be displayed, for example, in a known way.
  • the container for the milk can be removed from the cabinet for cleaning purposes, and another container with a cleaning agent put in its place, which cleaning agent can be conveyed through the extraction line, the further line and the emulsifying device by means of the peristaltic pump. Afterwards the container can be filled with rinse water, which can likewise be conveyed by the peristaltic pump through the system of lines of the device. This cleaning procedure is efficient and easy to carry out.
  • the flexible tube is made of silicon or a similar material, this tube thereby meeting the demands of elasticity and plasticity in the region of the peristaltic pump and fulfilling the requirements with respect to hygiene in connection with foodstuffs.
  • Another advantageous embodiment of the invention consists in this device for dispensing milk and/or milk froth being attached as a module to an automatic coffee machine, this coffee machine being able to be extended or upgraded through further modules.
  • a coffee machine is thereby created which is able to dispense automatically the most diverse kinds of coffee. Simple handling during dispensing of coffee is achieved if a dispensing cup is placed between brewing device and coffee discharge nozzle, in which cup the discharge nozzle of the emulsifying device also emerges and thus the dispensing of coffee, milk and/or milk froth takes place through the coffee discharge nozzle.
  • FIG. 1 in a schematic representation, the The device according to the invention for dispensing milk and/or milk froth, in which the peristaltic pump is shown in opened state;
  • FIG. 2 a schematic representation of the The device according to FIG. 1 , the peristaltic pump being shown in closed pump state;
  • FIG. 3 a view of the The device according to the invention with covers open;
  • FIG. 4 a view of the peristaltic pump in opened state
  • FIG. 5 a sectional representation of the peristaltic pump taken along the line V-V according to FIG. 4 ;
  • FIG. 6 a view of the peristaltic pump in the closed pump state
  • FIG. 7 a sectional representation of the peristaltic pump taken along the line VII-VII according to FIG. 6 ;
  • FIG. 8 a view of a coffee machine of modular design with the The device according to the invention.
  • FIG. 9 a view of the coffee machine according to FIG. 8 with opened front covers.
  • a container 1 in which milk 2 is held, is placed in a coolable cabinet 3 .
  • An extraction line 4 projects into the container 1 and consequently into the milk 2 .
  • This extraction line 4 is connected to a further line 5 serving as the connection to an emulsifying device 6 , which is disposed outside the coolable cabinet 3 .
  • steam can be conducted through the emulsifying device 6 , by means of which the milk 2 can be suctioned out of the container 1 via the extraction line 4 and the further line 5 .
  • air can also be supplied thereto, controlled by a valve, upon supply of air the milk in the emulsifying device being frothed up, whereas with closed air supply valve the milk is only heated up by the steam.
  • the corresponding product emerges through the discharge nozzle 7 , under which a cup can be placed, for instance.
  • a peristaltic pump 9 is disposed in an attached part 8 , likewise cooled, of the fillable cabinet 3 .
  • the further line 5 which consists of a flexible tube, preferably of silicon, is led through this peristaltic pump 9 .
  • the peristaltic pump 9 is shown in FIG. 1 in opened state; this means that the passage of the flexible tube 5 , forming the further line, is free.
  • the peristaltic pump 9 can also be closed, as is described in connection with FIG. 2 .
  • switching means 10 are provided which are made up of a piston cylinder unit 11 , by means of which the curved part 12 bordering the squeeze area is displaceable. Used for actuation of the piston cylinder unit 11 is water under pressure by means of which the piston is able to be impinged, this being controllable via a valve 13 , while the return water is collected in a reservoir 14 .
  • switching means could also be designed differently, for example as a motor or as an electromagnet.
  • the peristaltic pump 9 can be closed in that the curved part 12 is lowered by the impinged piston 15 of the piston cylinder unit 11 .
  • the flexible tube 5 is squeezed between this curved part 12 and the rollers 17 beneath, disposed on a spider 16 .
  • the spider 16 is set in rotation.
  • the rollers 17 roll on the curved part 12 .
  • the container 1 with the milk 2 contained therein in the coolable cabinet 3 rests on a scale 18 which is disposed in the region of the floor 19 of the coolable cabinet 3 .
  • the weight of the containers 1 is able to be determined with this scale 18 , and from that the filling level of the container can be ascertained.
  • a corresponding signal is delivered to the central control unit (not shown) of the device, resulting in the filling level being displayed in a suitable way.
  • FIG. 3 Shown in FIG. 3 is an embodiment of a The device according to the invention.
  • the coolable cabinet 3 is held in a frame 20 .
  • the space in which the container 1 is accommodated is provided with a closable door 21 .
  • the coolable cabinet 3 shown here operates according to the generally known Peltier principle.
  • the peristaltic pump 9 is accommodated in the attached part 8 belonging to the coolable cabinet 3 .
  • the emulsifying device 6 with the discharge nozzle 7 is height-adjustable along the rod 22 installed on this attached part 8 .
  • the further line or respectively the flexible tube 5 is not shown in this FIG. 3 . It would be run however from a connection point on the emulsifying device 6 through the peristaltic pump 9 , and from there via the channel 23 into the region of the container 1 .
  • FIGS. 4 to 7 show the peristaltic pump 9 .
  • the peristaltic pump 9 is shown in opened state
  • FIGS. 6 and 7 show the peristaltic pump 9 in closed state, in which pumping is possible.
  • Fixed to the piston rod 24 which is connected to the piston 15 of the piston cylinder unit 11 , is the curved part 12 .
  • the piston 15 with the piston rod 24 and thus with the curved part 12 can be lowered.
  • the tube is squeezed between the curved part 12 and the adjacent rollers 17 , as is shown in particular in FIG. 2 .
  • the spider 16 on which the rollers 17 are rotatably borne, allows itself to be set in rotation by an electromotor (not shown) via a drive shaft 25 .
  • the electromotor is accommodated outside the coolable cabinet 3 , i.e. the drive shaft 25 is led through the walling of the coolable cabinet 3 .
  • the rollers 17 squeeze the tube inserted in the peristaltic pump 9 in co-operation with the curved part successively, whereby the pump action occurs.
  • the rotational speed of the electromotor By changing the rotational speed of the electromotor, the quantity conveyed by the peristaltic pump 9 per time interval can be varied.
  • the peristaltic pump 9 When dispensing hot milk, the peristaltic pump 9 is kept in opened state, as is shown in FIGS. 1 , 4 and 5 . The passage of the flexible tube 5 is released. Steam is admitted in the emulsifying device 6 , the milk is suctioned from the container 1 and heated by the steam, and is discharged as hot milk through the discharge nozzles 7 . The air supply apparatus is connected to the emulsifying device 6 for this purpose.
  • the peristaltic pump 9 is likewise in opened state, steam is again conducted through the emulsifying device 6 , and the milk is suctioned out of the container 1 .
  • air is introduced into the emulsifying device 6 , the milk is frothed up and heated up in the emulsifying device, and the milk froth is then discharged through the discharge nozzle 7 .
  • the peristaltic pump 9 is put into closed state, as is shown in FIGS. 2 , 6 and 7 .
  • the spider 16 with the rollers 17 is set in rotation, the cool milk is pumped out of the container 1 into the emulsifying device 6 and is dispensed via the discharge nozzle 7 .
  • the steam supply and the air supply into the emulsifying device 6 are closed.
  • the further line 5 can be emptied by the peristaltic pump 9 being brought into the closed state and the spider 16 being rotated in opposite direction. The milk still located in the further line 5 is thereby pumped back into the container 1 .
  • the peristaltic pump 9 Before dispensing milk froth or hot milk, the peristaltic pump 9 can be brought into the closed state for a short time, and the pumping operation performed briefly, whereby the further line 5 to the emulsifying device 6 can be filled with milk, after which the dispensing of hot milk or milk froth can be carried out through the emulsifying device 6 and the discharge nozzle 7 with the peristaltic pump open. Thereby avoided is milk sputtering from the discharge nozzle during the suctioning by the emulsifying device when the further line 5 is still partially empty or has air bubbles.
  • the container 1 can be removed from the coolable cabinet 3 and be replaced by another container that is filled With a cleaning solution.
  • This cleaning solution has ideally a temperature of about 60° C., and can be an alkaline solution with which the fats are able to be dissolved more efficiently.
  • the peristaltic pump 9 is brought into the closed state and is put in operation, the cleaning agent is conveyed through the extraction line 4 , the further line 5 and die emulsifying device 6 , and it can escape into a collection vessel via the discharge nozzle 7 . After completion of the cleaning procedure, water can be filled in the container, after which the device can be rinsed thoroughly by actuation of the peristaltic pump.
  • the peristaltic pump 9 When the device is not being used for a longer period of time, it is advantageous to bring the peristaltic pump 9 into the opened state.
  • the region of the flexible tube 5 located in the peristaltic pump 9 is thereby mechanically released, increasing the life of the tube.
  • the flexible tube 5 In the opened state of the peristaltic pump 9 the flexible tube 5 can be simply taken out, if necessary, and cleaned by hand, for example, or replaced.
  • the system passed through by the milk is smooth to a large extent, and thus has no abrupt sectional changes or recesses which form dead zones in which residues can accumulate providing an ideal breeding ground for strains of bacteria.
  • the system in which the milk is transported is composed of a single tube or hose.
  • the two tubes are provided with a valve, which alternately opens the one tube to be used, and closes the other. The closing hereby takes place through pinching shut of the tube by the valve.
  • the device according to the invention for dispensing milk and/or milk froth or foam can be designed such that it may be integrated, for example, in a coffee machine, in particular in an espresso machine, as is shown in FIGS. 8 and 9 .
  • this coffee machine 26 had a container 27 , for receiving coffee beans, and at least one grinding device, a brewing device and a coffee discharge nozzle 28 , into which the discharge nozzles 7 of the device for dispensing milk and/or milk froth also emerge.
  • This device for dispensing milk and/or milk froth thus forms a module 29 , with which the coffee machine 26 can be supplemented and extended.
  • the module 30 intended for dispensing steam and hot water, also represents such a supplementary module.
  • Control of the coffee machine 26 and of the modules 29 and 30 preferably takes place via a central control unit, so that, for example, an optimal cappuccino, a macchiato, a black coffee, an espresso or milk coffee can be dispensed automatically.
  • a central control unit so that, for example, an optimal cappuccino, a macchiato, a black coffee, an espresso or milk coffee can be dispensed automatically.
  • the dispensing of hot water or steam is also possible.
  • a touch screen installed on the coffee machine serves the purpose of operation and selection of the various possible products.
  • the coffee machine 26 and the module 29 are each provided with an opening and closing door 31 , 32 forming the front covering. Access to the individual modules is thereby ensured, for example for cleaning of the brewing device of the coffee machine 26 or for filling of milk into the milk container in the module 29 .
  • the discharge nozzle 7 is separated from a dispensing cup 33 , on which the coffee discharge nozzle 28 is fixed.
  • the connection is re-established.
  • the dispensing cup 33 serves in particular the purpose of ensuring an optimal exit of the dispensed products through the coffee discharge nozzle 28 .
  • the emulsifying device 6 with the discharge nozzle 7 is height-adjustable.
  • the coffee discharge nozzle with the dispensing cup 33 is height-adjustable also in the state of being coupled with the discharge nozzle 7 , and is adjustable to the vessels in which the products are supposed to be dispensed.
  • the switching of the peristaltic pump 9 can be carried out directly with mains water under pressure.
  • Use of the pressurized water supplied by the pump of the coffee machine 26 could also be foreseen, however.
  • the device according to the invention for dispensing milk and/or milk froth is an appliance that can be operated optimally and with which products of high quality can be dispensed.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatus For Making Beverages (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Dairy Products (AREA)
US10/555,120 2003-05-02 2004-04-29 Device for dispensing milk and/or milk froth Active 2024-07-22 US7475628B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP03405312A EP1472963B1 (fr) 2003-05-02 2003-05-02 Dispositif pour distribuer du lait et/ou de la mousse de lait
EP03405312.4 2003-05-02
PCT/EP2004/050644 WO2004095993A1 (fr) 2003-05-02 2004-04-29 Dispositif pour extraire du lait et/ou de la mousse de lait

Publications (2)

Publication Number Publication Date
US20070031558A1 US20070031558A1 (en) 2007-02-08
US7475628B2 true US7475628B2 (en) 2009-01-13

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US10/555,120 Active 2024-07-22 US7475628B2 (en) 2003-05-02 2004-04-29 Device for dispensing milk and/or milk froth

Country Status (10)

Country Link
US (1) US7475628B2 (fr)
EP (1) EP1472963B1 (fr)
JP (1) JP2006525052A (fr)
KR (1) KR20060039393A (fr)
AT (1) ATE416658T1 (fr)
CA (1) CA2523799C (fr)
DE (1) DE50310897D1 (fr)
DK (1) DK1472963T3 (fr)
ES (1) ES2316710T3 (fr)
WO (1) WO2004095993A1 (fr)

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US20100047406A1 (en) * 2006-12-27 2010-02-25 Shahryar Reyhanloo Method for dispensing milk portions in drink preparation machines
US20100061841A1 (en) * 2008-09-11 2010-03-11 Visintainer Robert J Froth handling pump
US20110183057A1 (en) * 2008-03-20 2011-07-28 Pa Knowledge Limited Foaming device and method of providing foamed product
US20130209639A1 (en) * 2010-02-26 2013-08-15 Crem International Aktiebolag Mehtod and a system for producing foamed milk
US20150118367A1 (en) * 2010-02-17 2015-04-30 Koninklijke Douwe Egberts B.V. Coffee bean packaging cartridge and coffee beverage system including the same
US9980599B2 (en) 2009-02-17 2018-05-29 Koninklijke Douwe Egberts B.V. Coffee bean packaging cartridge and coffee beverage system including same
US10898025B2 (en) 2017-07-06 2021-01-26 Steiner Ag Weggis Apparatus with an outlet particularly for milk froth, and a coffee machine
US10980368B2 (en) 2013-11-29 2021-04-20 Steiner Ag Weggis Device for pouring out milk froth, liquids or the like
IT202100013451A1 (it) * 2021-05-24 2022-11-24 De Longhi Appliances Srl Dispositivo monta latte e macchina da caffè presentante detto dispositivo monta latte

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US20100061849A1 (en) * 2008-09-11 2010-03-11 Visintainer Robert J Froth handling pump
EP2168466A1 (fr) * 2008-09-26 2010-03-31 Jura Elektroapparate AG Dispositif d'ébouillantage doté d'une soupape de drainage
DE202009001491U1 (de) * 2009-02-06 2010-06-24 Melitta Haushaltsprodukte Gmbh & Co. Kommanditgesellschaft Vorrichtung zum Fördern von Milch
DE102009019266A1 (de) * 2009-04-28 2010-11-11 Wmf Württembergische Metallwarenfabrik Ag Getränkeautomat
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ITFI20090177A1 (it) 2009-08-03 2011-02-04 Saeco Strategic Services Ltd "un dispositivo di collegamento fra un vano refrigerato ed un erogatore di liquido e macchina per la preparazione di bevande comprendente detto dispositivo"
KR101086869B1 (ko) * 2009-10-20 2011-11-24 주식회사 이담테크 자동 분유혼합장치
ITFI20090249A1 (it) * 2009-11-25 2011-05-26 Saeco Ipr Ltd " contenitore emulsionatore per latte per una macchina da caffe' e macchina comprendente detto contentore"
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ATE416658T1 (de) 2008-12-15
WO2004095993A1 (fr) 2004-11-11
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EP1472963A1 (fr) 2004-11-03
DK1472963T3 (da) 2009-03-30
KR20060039393A (ko) 2006-05-08
CA2523799C (fr) 2011-01-04
CA2523799A1 (fr) 2004-11-11
JP2006525052A (ja) 2006-11-09
DE50310897D1 (de) 2009-01-22
ES2316710T3 (es) 2009-04-16

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